I washed the shirt to stop the process and... failed!! Appears that the negatives have blocked UV rays and heave not printed the images. Nevertheles...
Last month we're selected to participate into Lumi night at Makespace Madrid. This instructable summarizes a failed experiment. I decided to reuse old negatives to customize a shirt. This is the process.
Step 1: Materials
Natural fiber shirt, old negatives, scissors, Lumi product set, adhesive tape or other opaque material to the edge.